Contemporaneous observations of the radio galaxy NGC 1275 from radio to very high energy gamma-rays

Aims - The radio galaxy NGC 1275, recently identified as a very high energy (VHE, >100 GeV) γ-ray emitter by MAGIC, is one of the few non-blazar active galactic nuclei detected in the VHE regime. The purpose of this work is to better understand the origin of the γ-ray emission and locate it withi...

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Main Authors:	Aleksic, J., Ansoldi, S., Antonelli, L., Antoranz, P., Babic, A., Bangale, P., Barres de Almeida, U., Barrio, J., Becerra, J., Bednarek, W., Berger, K., Bernardini, E., Biland, A., Blanch Bigas, O., Bock, R., Bonnefoy, S., Bonnoli, G., Borracci, F., Bretz, T., Carmona, E., Carosi, A., Carreto Fidalgo, D., Colin, P., Colombo, E., Contreras, J., Cortina, J., Covino, S., Da Vela, P., Dazzi, F., de Angelis, A., De Caneva, G., De Lotto, B., Delgado, C., Doert, M., Dominguez, A., Dominis Prester, D., Dorner, D., Doro, M., Einecke, S., Eisenacher, D., Elsaesser, D., Farina, E., Ferenc, D., Fonseca, M., Font, L., Frantzen, K., Fruck, C., Garcia López, R., Garczarczyk, M., Garrido Terrats, D., Gaug, M., Giavitto, G., Godinovic, N., González Muñoz, A., Gozzini, S., Hadamek, A., Hadasch, D., Herrero, A., Hildebrand, D., Hose, J., Hrupec, D., Idec, W., Kadenius, V., KELLERMANN, K., Knoetig, M., Krause, J., Kushida, J., La Barbera, A., Lelas, D., Lewandowska, N., Lindfors, E., Lombardi, S., López, M., López-Coto, R., López-Oramas, A., Lorenz, E., Lozano, I., Makariev, M., Mallot, K., Maneva, G., Mankuzhiyil, N., Mannheim, K., Maraschi, L., Marcote, B., Mariotti, M., Martínez, M., Mazin, D., Menzel, U., Meucci, M., Miranda, J., Mirzoyan, R., Moralejo Olaizola, A., Munar-Adrover, P., Nakajima, D., Niedzwiecki, A., Nilsson, K., Nowak, N., Orito, R., Overkemping, A., Paiano, S., Palatiello, M., Paneque, D., Paoletti, R., Paredes, J., Paredes-Fortuny, X., Partini, S., Persic, M., Prada, F., Prada Moroni, P., Prandini, E., Preziuso, S., Puljak, I., Reinthal, R., Rhode, W., Ribo, M., Rico, J., Rodriguez Garcia, J., Rugamer, S., Saggion, A., Saito, T., Saito, K., Salvati, M., Satalecka, K., Scalzotto, V., Scapin, V., Schultz, C., Schweizer, T., Shore, S., Sillanpää, A., Sitarek, J., Snidaric, I., Sobczynska, D., Spanier, F., Stamatescu, V., Stamerra, A., Steinbring, T., Storz, J., Sun, S., Suric, T., Takalo, L., Tavecchio, F., Terzic, T., Tescaro, D., Teshima, M., Thaele, J., Tibolla, Omar, Torres, D., Toyama, T., Treves, A., Uellenbeck, M., Vogler, P., Wagner, R., Zandanel, F., Zanin, R., Balmaverde, B., Kataoka, J., Rekola, R., Takahashi, Y.
Format:	Journal Article
Published:	EDP Sciences 2014
Subjects:	galaxies: individual: NGC 1275 galaxies: jets gamma rays: galaxies galaxies: active
Online Access:	http://hdl.handle.net/20.500.11937/46160

_version_	1848757482216751104
author	Aleksic, J. Ansoldi, S. Antonelli, L. Antoranz, P. Babic, A. Bangale, P. Barres de Almeida, U. Barrio, J. Becerra, J. Bednarek, W. Berger, K. Bernardini, E. Biland, A. Blanch Bigas, O. Bock, R. Bonnefoy, S. Bonnoli, G. Borracci, F. Bretz, T. Carmona, E. Carosi, A. Carreto Fidalgo, D. Colin, P. Colombo, E. Contreras, J. Cortina, J. Covino, S. Da Vela, P. Dazzi, F. de Angelis, A. De Caneva, G. De Lotto, B. Delgado, C. Doert, M. Dominguez, A. Dominis Prester, D. Dorner, D. Doro, M. Einecke, S. Eisenacher, D. Elsaesser, D. Farina, E. Ferenc, D. Fonseca, M. Font, L. Frantzen, K. Fruck, C. Garcia López, R. Garczarczyk, M. Garrido Terrats, D. Gaug, M. Giavitto, G. Godinovic, N. González Muñoz, A. Gozzini, S. Hadamek, A. Hadasch, D. Herrero, A. Hildebrand, D. Hose, J. Hrupec, D. Idec, W. Kadenius, V. KELLERMANN, K. Knoetig, M. Krause, J. Kushida, J. La Barbera, A. Lelas, D. Lewandowska, N. Lindfors, E. Lombardi, S. López, M. López-Coto, R. López-Oramas, A. Lorenz, E. Lozano, I. Makariev, M. Mallot, K. Maneva, G. Mankuzhiyil, N. Mannheim, K. Maraschi, L. Marcote, B. Mariotti, M. Martínez, M. Mazin, D. Menzel, U. Meucci, M. Miranda, J. Mirzoyan, R. Moralejo Olaizola, A. Munar-Adrover, P. Nakajima, D. Niedzwiecki, A. Nilsson, K. Nowak, N. Orito, R. Overkemping, A. Paiano, S. Palatiello, M. Paneque, D. Paoletti, R. Paredes, J. Paredes-Fortuny, X. Partini, S. Persic, M. Prada, F. Prada Moroni, P. Prandini, E. Preziuso, S. Puljak, I. Reinthal, R. Rhode, W. Ribo, M. Rico, J. Rodriguez Garcia, J. Rugamer, S. Saggion, A. Saito, T. Saito, K. Salvati, M. Satalecka, K. Scalzotto, V. Scapin, V. Schultz, C. Schweizer, T. Shore, S. Sillanpää, A. Sitarek, J. Snidaric, I. Sobczynska, D. Spanier, F. Stamatescu, V. Stamerra, A. Steinbring, T. Storz, J. Sun, S. Suric, T. Takalo, L. Tavecchio, F. Terzic, T. Tescaro, D. Teshima, M. Thaele, J. Tibolla, Omar Torres, D. Toyama, T. Treves, A. Uellenbeck, M. Vogler, P. Wagner, R. Zandanel, F. Zanin, R. Balmaverde, B. Kataoka, J. Rekola, R. Takahashi, Y.
author_facet	Aleksic, J. Ansoldi, S. Antonelli, L. Antoranz, P. Babic, A. Bangale, P. Barres de Almeida, U. Barrio, J. Becerra, J. Bednarek, W. Berger, K. Bernardini, E. Biland, A. Blanch Bigas, O. Bock, R. Bonnefoy, S. Bonnoli, G. Borracci, F. Bretz, T. Carmona, E. Carosi, A. Carreto Fidalgo, D. Colin, P. Colombo, E. Contreras, J. Cortina, J. Covino, S. Da Vela, P. Dazzi, F. de Angelis, A. De Caneva, G. De Lotto, B. Delgado, C. Doert, M. Dominguez, A. Dominis Prester, D. Dorner, D. Doro, M. Einecke, S. Eisenacher, D. Elsaesser, D. Farina, E. Ferenc, D. Fonseca, M. Font, L. Frantzen, K. Fruck, C. Garcia López, R. Garczarczyk, M. Garrido Terrats, D. Gaug, M. Giavitto, G. Godinovic, N. González Muñoz, A. Gozzini, S. Hadamek, A. Hadasch, D. Herrero, A. Hildebrand, D. Hose, J. Hrupec, D. Idec, W. Kadenius, V. KELLERMANN, K. Knoetig, M. Krause, J. Kushida, J. La Barbera, A. Lelas, D. Lewandowska, N. Lindfors, E. Lombardi, S. López, M. López-Coto, R. López-Oramas, A. Lorenz, E. Lozano, I. Makariev, M. Mallot, K. Maneva, G. Mankuzhiyil, N. Mannheim, K. Maraschi, L. Marcote, B. Mariotti, M. Martínez, M. Mazin, D. Menzel, U. Meucci, M. Miranda, J. Mirzoyan, R. Moralejo Olaizola, A. Munar-Adrover, P. Nakajima, D. Niedzwiecki, A. Nilsson, K. Nowak, N. Orito, R. Overkemping, A. Paiano, S. Palatiello, M. Paneque, D. Paoletti, R. Paredes, J. Paredes-Fortuny, X. Partini, S. Persic, M. Prada, F. Prada Moroni, P. Prandini, E. Preziuso, S. Puljak, I. Reinthal, R. Rhode, W. Ribo, M. Rico, J. Rodriguez Garcia, J. Rugamer, S. Saggion, A. Saito, T. Saito, K. Salvati, M. Satalecka, K. Scalzotto, V. Scapin, V. Schultz, C. Schweizer, T. Shore, S. Sillanpää, A. Sitarek, J. Snidaric, I. Sobczynska, D. Spanier, F. Stamatescu, V. Stamerra, A. Steinbring, T. Storz, J. Sun, S. Suric, T. Takalo, L. Tavecchio, F. Terzic, T. Tescaro, D. Teshima, M. Thaele, J. Tibolla, Omar Torres, D. Toyama, T. Treves, A. Uellenbeck, M. Vogler, P. Wagner, R. Zandanel, F. Zanin, R. Balmaverde, B. Kataoka, J. Rekola, R. Takahashi, Y.
author_sort	Aleksic, J.
building	Curtin Institutional Repository
collection	Online Access
description	Aims - The radio galaxy NGC 1275, recently identified as a very high energy (VHE, >100 GeV) γ-ray emitter by MAGIC, is one of the few non-blazar active galactic nuclei detected in the VHE regime. The purpose of this work is to better understand the origin of the γ-ray emission and locate it within the galaxy. Methods - We studied contemporaneous multifrequency observations of NGC 1275 and modeled the overall spectral energy distribution. We analyzed unpublished MAGIC observations carried out between October 2009 and February 2010, and the previously published observations taken between August 2010 and February 2011. We studied the multiband variability and correlations by analyzing data of Fermi-LAT in the 100 MeV–100 GeV energy band, as well as Chandra (X-ray), KVA (optical), and MOJAVE (radio) data taken during the same period. Results - Using customized Monte Carlo simulations corresponding to early MAGIC stereoscopic data, we detect NGC 1275 also in the earlier MAGIC campaign. The flux level and energy spectra are similar to the results of the second campaign. The monthly light curve above 100 GeV shows a hint of variability at the 3.6σ level. In the Fermi-LAT band, both flux and spectral shape variabilities are reported. The optical light curve is also variable and shows a clear correlation with the γ-ray flux above 100 MeV. In radio, three compact components are resolved in the innermost part of the jet. One of these components shows a similar trend as the Fermi-LAT and KVA light curves. The γ-ray spectra measured simultaneously with MAGIC and Fermi-LAT from 100 MeV to 650 GeV can be well fitted either by a log-parabola or by a power-law with a subexponential cutoff for the two observation campaigns. A single-zone synchrotron-self-Compton model, with an electron spectrum following a power-law with an exponential cutoff, can explain the broadband spectral energy distribution and the multifrequency behavior of the source. However, this model suggests an untypical low bulk-Lorentz factor or a velocity alignment closer to the line of sight than the parsec-scale radio jet.
first_indexed	2025-11-14T09:28:48Z
format	Journal Article
id	curtin-20.500.11937-46160
institution	Curtin University Malaysia
institution_category	Local University
last_indexed	2025-11-14T09:28:48Z
publishDate	2014
publisher	EDP Sciences
recordtype	eprints
repository_type	Digital Repository
spelling	curtin-20.500.11937-461602017-09-13T15:04:46Z Contemporaneous observations of the radio galaxy NGC 1275 from radio to very high energy gamma-rays Aleksic, J. Ansoldi, S. Antonelli, L. Antoranz, P. Babic, A. Bangale, P. Barres de Almeida, U. Barrio, J. Becerra, J. Bednarek, W. Berger, K. Bernardini, E. Biland, A. Blanch Bigas, O. Bock, R. Bonnefoy, S. Bonnoli, G. Borracci, F. Bretz, T. Carmona, E. Carosi, A. Carreto Fidalgo, D. Colin, P. Colombo, E. Contreras, J. Cortina, J. Covino, S. Da Vela, P. Dazzi, F. de Angelis, A. De Caneva, G. De Lotto, B. Delgado, C. Doert, M. Dominguez, A. Dominis Prester, D. Dorner, D. Doro, M. Einecke, S. Eisenacher, D. Elsaesser, D. Farina, E. Ferenc, D. Fonseca, M. Font, L. Frantzen, K. Fruck, C. Garcia López, R. Garczarczyk, M. Garrido Terrats, D. Gaug, M. Giavitto, G. Godinovic, N. González Muñoz, A. Gozzini, S. Hadamek, A. Hadasch, D. Herrero, A. Hildebrand, D. Hose, J. Hrupec, D. Idec, W. Kadenius, V. KELLERMANN, K. Knoetig, M. Krause, J. Kushida, J. La Barbera, A. Lelas, D. Lewandowska, N. Lindfors, E. Lombardi, S. López, M. López-Coto, R. López-Oramas, A. Lorenz, E. Lozano, I. Makariev, M. Mallot, K. Maneva, G. Mankuzhiyil, N. Mannheim, K. Maraschi, L. Marcote, B. Mariotti, M. Martínez, M. Mazin, D. Menzel, U. Meucci, M. Miranda, J. Mirzoyan, R. Moralejo Olaizola, A. Munar-Adrover, P. Nakajima, D. Niedzwiecki, A. Nilsson, K. Nowak, N. Orito, R. Overkemping, A. Paiano, S. Palatiello, M. Paneque, D. Paoletti, R. Paredes, J. Paredes-Fortuny, X. Partini, S. Persic, M. Prada, F. Prada Moroni, P. Prandini, E. Preziuso, S. Puljak, I. Reinthal, R. Rhode, W. Ribo, M. Rico, J. Rodriguez Garcia, J. Rugamer, S. Saggion, A. Saito, T. Saito, K. Salvati, M. Satalecka, K. Scalzotto, V. Scapin, V. Schultz, C. Schweizer, T. Shore, S. Sillanpää, A. Sitarek, J. Snidaric, I. Sobczynska, D. Spanier, F. Stamatescu, V. Stamerra, A. Steinbring, T. Storz, J. Sun, S. Suric, T. Takalo, L. Tavecchio, F. Terzic, T. Tescaro, D. Teshima, M. Thaele, J. Tibolla, Omar Torres, D. Toyama, T. Treves, A. Uellenbeck, M. Vogler, P. Wagner, R. Zandanel, F. Zanin, R. Balmaverde, B. Kataoka, J. Rekola, R. Takahashi, Y. galaxies: individual: NGC 1275 galaxies: jets gamma rays: galaxies galaxies: active Aims - The radio galaxy NGC 1275, recently identified as a very high energy (VHE, >100 GeV) γ-ray emitter by MAGIC, is one of the few non-blazar active galactic nuclei detected in the VHE regime. The purpose of this work is to better understand the origin of the γ-ray emission and locate it within the galaxy. Methods - We studied contemporaneous multifrequency observations of NGC 1275 and modeled the overall spectral energy distribution. We analyzed unpublished MAGIC observations carried out between October 2009 and February 2010, and the previously published observations taken between August 2010 and February 2011. We studied the multiband variability and correlations by analyzing data of Fermi-LAT in the 100 MeV–100 GeV energy band, as well as Chandra (X-ray), KVA (optical), and MOJAVE (radio) data taken during the same period. Results - Using customized Monte Carlo simulations corresponding to early MAGIC stereoscopic data, we detect NGC 1275 also in the earlier MAGIC campaign. The flux level and energy spectra are similar to the results of the second campaign. The monthly light curve above 100 GeV shows a hint of variability at the 3.6σ level. In the Fermi-LAT band, both flux and spectral shape variabilities are reported. The optical light curve is also variable and shows a clear correlation with the γ-ray flux above 100 MeV. In radio, three compact components are resolved in the innermost part of the jet. One of these components shows a similar trend as the Fermi-LAT and KVA light curves. The γ-ray spectra measured simultaneously with MAGIC and Fermi-LAT from 100 MeV to 650 GeV can be well fitted either by a log-parabola or by a power-law with a subexponential cutoff for the two observation campaigns. A single-zone synchrotron-self-Compton model, with an electron spectrum following a power-law with an exponential cutoff, can explain the broadband spectral energy distribution and the multifrequency behavior of the source. However, this model suggests an untypical low bulk-Lorentz factor or a velocity alignment closer to the line of sight than the parsec-scale radio jet. 2014 Journal Article http://hdl.handle.net/20.500.11937/46160 10.1051/0004-6361/201322951 EDP Sciences unknown
spellingShingle	galaxies: individual: NGC 1275 galaxies: jets gamma rays: galaxies galaxies: active Aleksic, J. Ansoldi, S. Antonelli, L. Antoranz, P. Babic, A. Bangale, P. Barres de Almeida, U. Barrio, J. Becerra, J. Bednarek, W. Berger, K. Bernardini, E. Biland, A. Blanch Bigas, O. Bock, R. Bonnefoy, S. Bonnoli, G. Borracci, F. Bretz, T. Carmona, E. Carosi, A. Carreto Fidalgo, D. Colin, P. Colombo, E. Contreras, J. Cortina, J. Covino, S. Da Vela, P. Dazzi, F. de Angelis, A. De Caneva, G. De Lotto, B. Delgado, C. Doert, M. Dominguez, A. Dominis Prester, D. Dorner, D. Doro, M. Einecke, S. Eisenacher, D. Elsaesser, D. Farina, E. Ferenc, D. Fonseca, M. Font, L. Frantzen, K. Fruck, C. Garcia López, R. Garczarczyk, M. Garrido Terrats, D. Gaug, M. Giavitto, G. Godinovic, N. González Muñoz, A. Gozzini, S. Hadamek, A. Hadasch, D. Herrero, A. Hildebrand, D. Hose, J. Hrupec, D. Idec, W. Kadenius, V. KELLERMANN, K. Knoetig, M. Krause, J. Kushida, J. La Barbera, A. Lelas, D. Lewandowska, N. Lindfors, E. Lombardi, S. López, M. López-Coto, R. López-Oramas, A. Lorenz, E. Lozano, I. Makariev, M. Mallot, K. Maneva, G. Mankuzhiyil, N. Mannheim, K. Maraschi, L. Marcote, B. Mariotti, M. Martínez, M. Mazin, D. Menzel, U. Meucci, M. Miranda, J. Mirzoyan, R. Moralejo Olaizola, A. Munar-Adrover, P. Nakajima, D. Niedzwiecki, A. Nilsson, K. Nowak, N. Orito, R. Overkemping, A. Paiano, S. Palatiello, M. Paneque, D. Paoletti, R. Paredes, J. Paredes-Fortuny, X. Partini, S. Persic, M. Prada, F. Prada Moroni, P. Prandini, E. Preziuso, S. Puljak, I. Reinthal, R. Rhode, W. Ribo, M. Rico, J. Rodriguez Garcia, J. Rugamer, S. Saggion, A. Saito, T. Saito, K. Salvati, M. Satalecka, K. Scalzotto, V. Scapin, V. Schultz, C. Schweizer, T. Shore, S. Sillanpää, A. Sitarek, J. Snidaric, I. Sobczynska, D. Spanier, F. Stamatescu, V. Stamerra, A. Steinbring, T. Storz, J. Sun, S. Suric, T. Takalo, L. Tavecchio, F. Terzic, T. Tescaro, D. Teshima, M. Thaele, J. Tibolla, Omar Torres, D. Toyama, T. Treves, A. Uellenbeck, M. Vogler, P. Wagner, R. Zandanel, F. Zanin, R. Balmaverde, B. Kataoka, J. Rekola, R. Takahashi, Y. Contemporaneous observations of the radio galaxy NGC 1275 from radio to very high energy gamma-rays
title	Contemporaneous observations of the radio galaxy NGC 1275 from radio to very high energy gamma-rays
title_full	Contemporaneous observations of the radio galaxy NGC 1275 from radio to very high energy gamma-rays
title_fullStr	Contemporaneous observations of the radio galaxy NGC 1275 from radio to very high energy gamma-rays
title_full_unstemmed	Contemporaneous observations of the radio galaxy NGC 1275 from radio to very high energy gamma-rays
title_short	Contemporaneous observations of the radio galaxy NGC 1275 from radio to very high energy gamma-rays
title_sort	contemporaneous observations of the radio galaxy ngc 1275 from radio to very high energy gamma-rays
topic	galaxies: individual: NGC 1275 galaxies: jets gamma rays: galaxies galaxies: active
url	http://hdl.handle.net/20.500.11937/46160

Contemporaneous observations of the radio galaxy NGC 1275 from radio to very high energy gamma-rays

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